Science
Hubble Shows the True Size of Andromeda – Universe Today
The Andromeda galaxy has an enormous halo of gas around it. It stretches as far as 2 million light years from the galactic center.
It’s possible that you’ve seen the Andromeda galaxy (M31) without even realizing it. The massive spiral galaxy appears as a grey, spindle-shaped blob in the night sky, visible with the naked eye in the right conditions. It’s the nearest major galaxy to ours, and astronomers have studied it a lot.
Now astronomers have used the Hubble Space Telescope to map out Andromeda’s enormous halo of hot gas.
Scientists call the halo of gas surrounding galaxies the circumgalactic medium (CGM.) The CGM is d…
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